Which Firefox extensions?

I’m a new recruit to Firefox. The tabbed browsing is what sold me; but it was the extensions that drew me.

I currently use NoScript, Wizz RSS News Reader, Auto Copy, Bork Bork, TinyURL, View in IE and CustomizeGoogle.

Of those, NoScript and Auto Copy are the most useful to me; but Bork bork does make me laugh.

So which extensions does everyone else use?